Kael stiegelmayek



Nov. 4, 1930. K. STIEGELMAYER JAZZ ORGAN Filed April 10, 1928 INVENTOR Kfilzeyelmngu A TTORNEY Patented Nov. 4, 1939 KARL STIEGELMAYER, 9F IQE'W YORK, N. Y.

JAZZ OEGAH Application filed April 10,

The main object of this invention is to provide a musical instrument of the accordion type which has an inclined keyboard mounted thereon so that an entire range of keys may be posiioned on the board in a convenient location so that the keys may be easily manipulated by the fingers.

Another object of this invention is to provide a musical instrument of the accordion type having an inclined key-board on which a full set of keys may be mounted. The keys, due to the shortness of the key-board, are quite close together and are specially constructed in view of the above feature, so that they may be easily manipulated by the fingers.

The above and other objects will become apparent in the description below, in which characters of reference refer to like-named parts in the drawing.

Referring briefly to the drawing, Figure 1 is a perspective view of the jazz organ.

Figure 2 is an elevational view of one end of the jazz organ.

Figure 3 is an elevational View of the opposite end of the jazz organ.

Referring in detail to the drawing, the numeral 10 indicates the bellows. This bellows is constructed into a number of folding members which are formed of some suitable material to serve the purpose. The bellows is open at both ends. One of these open ends is enclosed by a frame 11. This frame is a box-like structure having a face 12 which closes it from one side. The face of this frame has an inclined platform 18 thereon which serves as a key-board housing. This housing is recessed throughout its entire length and extends substantially diagonally from the upper corner to the lower corner of the face 12. A. plurality of keys 14 are mounted in the recess of the housing. Both sides of these keys are chamfered as indicated by the numeral 15, creating a V-shaped space between adjacent keys. As these keys are small, owing to the length of the housing and are made to such small dimension in order that the housing receive a complete piano key-board, the chamfering permits the 19.13 Sciml No. 263,318.

: pgers to easily manipulate the keys. flats and sharps keys 16 are also provider. on the key-board and extend half the length of the keys 1%. Both of these keys are adapted to be depressed in playing the instrument. The opposite end of the bellows is closed by frame 17 which is similar to the frame 11, and face 18 of the frame 1? is provided with an arcuate recess 19 in which groups of buttons 20 to the number of 30 are house These buttons surmount studs not shown on the drawing, which form the dampening keys of the instrument. Besides the recess 19 a wrist strap 21 is mounted on the face 18 of the frame 1'? through which the wrist is slipped for holding the instru ment.

The main object of this invention is to provide a complete key-board on an accordionlike organ which has not been possible here tofore owing to the construction of the individual keys. This is made possible in this type of instrument by chamfering the sides of the main keys 1% as indicated by the numeral 15 throughout half of the length of the keys. An inclined key-board has not been used heretofore on this type of instrument and by inclining the keyboard greater comfort and convenience in playing is made possible. An accompanying dampening key for each key on the key-boa rd is provided on the opposite frame 17 and is indicated by the numeral 20. These keys are aranged in convenient groups so that the learner iav easily master the instrument. I,

It is to be noted that certain changes in form and constri tron may be made without departing from the spirit and scope of the invention.

1 claim:

1. In a jazz organ, bellows. a frame enclosing each end of said bellows, a key-board mounted on the face of one of said frames. said key-board extending diagonally from an upper corner outwardly to a lower corner, said key-board having keys thereon, the keys having inclined sides.

9.. in a jazz organ, a bellows. a frame enclosing each end of said bellows, a key-board mounted on the face of one of said frames,

7 said key-board extending diagonally from an upper corner outwardly to a lower corner, said key-board having keys thereon, the keys having inclined sides, the inclination of the sides of said keys extending half the length a of said keys.

In testimony whereof I aflix my signature.

KARL STIEGELMAYER; 

